Jointing attachment for cutter-heads.



H. A. PERKINS. JOINTING ATTACHMENT POR GUTTER HEADS. APPLIOATION FILED AUG. a1. 1912.

ATTORNEYS l H. vAjPRKms.

- JOINTING ATTACHMENT Pon CUTTER HEADS- APPLIoATIoN TTLB'D me. 31", 1912.

Patented Mar. 4, 1913.

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BY v i JvCJf/.Ca

ATTORNEYS is a section at right angles to Fig, 1 looking vUNITED STATES PATENT oEEioE.

HIRAM A. PERKINS, or RocHEsTER, NEW YORK, AssIGNoR To AMERICAN woon WORKING MACHINERY co., or.' ROCHESTER,

PENNSYLVANIA.

NEW YORK, .a coRroRA'rIoN 0E JOINTING ATTACHMENT FOR CUTTER-HEADS.

'Application filed yAugust ,31, 1912 Serial No. 718,155.`

T o all lwhom it may concern iBe it known that I, Hman. A. PERKINS,

surface planer in such a manner that the4 jointing operation can be carried on -at. any

time without the necessity of attaching any supporting parts orl stopping the machine.

It 'further consists in certain .details of construction for carrying out the objects sought.

Inthe drawings, Figure 1 is a transverse section of a lower cutter head, its supporting yoke and the contiguous parts:,F1g. 2

in the direction of the arrow. Fig. 3 is an elevation of the slide bar adjustment.` Fig;

" 4 is a plan View of the jointing block and i tors,

stone.

As is well known to planing mill operait is necessary after' roughly setting and clamping up the knives 'in a planer cylinder, to grind off the cutting edges to an exactly 'uniforml cutting circle; and this is done by running the cylinder at fullV speed and sliding alongkit a'n abrasive block on ways,-parallel to the axis of the cylinder, so adjusted as to just touch the cuttin edges and thus grind yor joint them all own to a uniformly exact radial distance from said i axis. This insures the accurate division of the cutting action among all the knives which thus produce smooth work at a high raie of feed. There are, however, many difficulties connected with the practical apsuch devices and the object of luy inventionis to overcome these difliculties.

A, Figs. 1 and 2, is a portion of the fram- .ing of a double surface planer.- B is the lower cylinder or cutter head which is provided with knives 2 secured in any suitable ll'llllllelplication of C is the infeed work tableand 'D' the delivery bed, both of which1 are suitably secured to the frame A. i F is a yoke. having boxes 3 3 at each end in which the' cylinder journalsv aresupported, the latter' carrying driving pulleys 'G in the usual manner. The above described parts are common to double surface planing machines, and my `invention is embodied linadjacentparts which form` the jointing mechanismA for the knives. H is a. supporting casing having slide ways '4 at the Vupper edge upon which the yo-ke F is fitted so as to slide longitudinally and thus be drawn out trans- .versely to thel machine to obtain access to the knives. This casing extends across'the machine and is supported on-'the frame A by means of screws 27.having bearin s onV strong lugs 28 in said frame and, shoul ered thereon vertically.- Screws 27 are threaded into the' casing H and may beoperated any convenient manner, but` I prefer to attach worm gears or spiral gears 29 to their ends and operate them by means of a cross shaft 30 carrying corres onding gears' mesh-- ing'into gears 29. of the frame A at one end for the attachment of a wrench or crank handle.' Thus both ends ofthe casing and cutter head are adjusted simultaneously.` The front wal-l 31 of the casing is inclined for such a. p0r- Patenten Mar. 4,1913.

Sha t 30 extends outside y.

tion of its length as corresponds to the position of the cutter head transversely,v as indicated in Fig. 2, for thev purpose of directing motion of the cut-ter head `into the delivery pipe 5, which is attached to the bottom `of the casing 4. Thus the latter performs several functions: supporting the cutter head' yoke, providing space for the introduction of the knife jointer, confining and conveying away the shavings, and forming the medium for the vertical adjustment of the Acutter head to the work. To the rear Walk` 6 of this casing, I attach a lon itudinal slidebar 7 by means of a central pivot bolt -8` Fig. 2,"and two clamp bolts located near tue ends of the slide in vertical slots 9, perthe shavings as they are forced by the mittingaslight oscillation for adjustment.

J is a carriage fitted to move freely along this slide bar and to this, at rightangles to the slide bar, is fitted au adjustable block- 10 which moves vertically in slide ways 32 prej'iaredffor it. Adjustment secured by ymeans 'of a screw ll to which is att-ached'a ibs.

worin Gear 12 and a short shaft 13 carries a corresponding worin' 14 meshing into the worm gear. The shaft 13 has bearings on the carriage J and the sereT 11 is supported by the boss 15 also onptlie carriage: Thus by revolving the shaft 1'3 the block 10 is adjusted vertically.

A lug 16 on the block 10 is adapted to receive anl abrading stone 17 and a gib 1S,

'shaft 13, and the operator isthus enabled to quickly 'apply it and reciprocate carriage J on its Ways for the full length ofthe knives, and when necessary to `adjust the stone 17 to its Work the handle-'2O may be revolved Itogether with shaft 13 and the ad-j justment thus made throughfthe worin and.

Worm Wheel and vscrew l1. The exact method shown. of attaching the handle 20 to the shaft 13 is not essential, because any method which permits of the reciprocation lof the carriage and the revolution 0f shaft 13 would fulfil the requirements of my in vention. l,

For the purpose of alining the slide bar 7 exactly parallel With the axis of the cutter head and fixing it rigidly VWhere ad; justed I provide projecting ears 23 and 24, one on the bar 7 and one on the casing H. Through one of these, 23, a tubular screw 25 is threaded and through its bore a screw` 26 passes freely and is threaded into the other ear 24. The end of screw 25 rests against ear 24 and thus fixes the adjustment, and the screw 26 binds them rigidly together after adjustment.

In Fig. 2 the carriage J is shown in a midway position with the stone 17 in action on the knives, but .when not in use the carriage is pulled over toward the operator, with the stone out of contact With the knives as indicated in dotted lines Fig.- 2. When the work begins to indicate that the knives are not cutting equally, the carriage J is pushed forwardv the handle 22 to just touch the edges of the knives Carriage J may then be traversed along the 4 times as necessary to bring them to an exact cutting circle: This operation can be j' repeated as Often as seems required, at a' monients notice and Without the attachment or detachment of any parts, while the '.inachine is in operation.

y It'will be seen. that the vlocation of the vjointing slide 7 on that side ofthe j cutter head away from the flow ingsv for the ment under and the stone adjusted by-4 revolving knives as many of the sliavings 4. In .a wood planin tends to keep the operating parts clean and in constant working condition, for the reason that the centrifugal action of the knives ,creates afstrong. currentdown the inclined wall 31 through the casing H and Vinto the pipe 5 as shown by the arrow in Fig. 1, and

4thusaway from the wall VGV of thevcasing. It.

will also be noted .that by tliislocat-ion of slide 7 I am enabled to approach the knives with the stone 17, directly under the axis of the cutter head,thus joint-ing them when the cutter head journals are lying fairly in their bearings. These are-important points becauselier'etofore the jointer slides more efficient and accurate method dof jointinghciitter head's is to apply the 'stone-` either .directly above oi; .directly under the -axis of the head. Byattachingthe slide bar 7 to the casing II it thus remains in thesame .relative position tothe cutter head when it is adjusted to its cut, while at thes'anie time the cutter head and itsyoke are free to" be drawn out on the 'Ways' 4 independently of -the joint-ing attachment.

lVhat I claim as'iny 'invention and desirevto secure by1 Letters Patent is:

1. Ina Wood planing inachinear-lower cutter head, a supportingyoke with bearsaine, 'a` knif'e Ointi-ng attachsaid cutter head,I inca-ns vfor` vertically adjusting the cutter head, its yoke and the jointing attachment simultaneously; and means for adjusting the jointing stone independently, whereby the jointing'attachnient is in position to operate whenever required, without disturbing any adjacent part of the machine.

2. Ina wood planing machine.` a lower cutter head, a yoke for the same with bearing boxes, `a supporting casing witlislide ways upon which the cutter head yoke'inay be drawn out transversely to thc -niachineg'a jointing or knife truiiig attachment secured to and inclosed by the casing, :means forverticallyadjusting said casing and cutter head to the cut4 ndindepei'ident means for adjusting the join'ting stone t'o. the knives. j

3. Ina wood planing 1 niaclii cutter head,v a yoke for the'. saine* i'v li beaiing boxes, ,a casing supporting' TV5-'oke and made vertically ac ljiistal'flefto vary `the eut, slide ways lon said casingx peifiiiitting Athe cutter headpandjyoke tobe drawn out of themachine transversely, afslide bar secured within lsaid casing, a c arriageon said bar, a grinding stone,attzacliedg.tothe carriage directly .under,the'cutten'fliwd and means lfor` traversing the l.grindingjstone along the knivesV for tliepurposes'set forth.

g yinaceliine', .a lowervl 'Copies of this patent may be obtained for 'cutter head and its yoke, a supjaorting casing under the yoke, a slide bar located within said casing below the cutter head` and' on the side of the axis of the latter opposite the direction of .the feed, a carriage mow ing thereon carrying a jointing stone which is adjustable to the knives, whereby the slide and its carriage are removed Jfrom the line of the shavings passing through the casing into the delivery pipe.

5. In a Wood planing machine a lower cutter head, a yoke for the same with bearing boxes, a slide barL located below the yoke,

and constructed to tilt on a suitable pivot, a-

to the edge of. the knives, and detachable planing machine, a lower means for traversing the stone along the knives and also 'adjusting it to its Work wherebythe operation of joint-ing'is rendered simple and expeditious.

7. In a wood planing machine, a lower cutter head, a jointing attachment located under such cutter head comprising a slide bar, a carriage traversing said bar, a grinding or jointing stone made vertically adjustable on said carriage, a screwfor adjust-ing the stone, a horizontal shaft to which an actuating handle/is detachably vconnectingmotion from the horizontal shaft tov the adjusting screvl, whereby the carriage may f be traversed along the slide bar and the adjusting screw revolved atthe will of the operator.

einen A. Pnnnnvs vVlitnessesi .WILLIAM GARLACH, Jr., FRENCH.

:ive cents each, Washington, D. C.

by addressing the Commissioner ,of'atenta ed, gears or equivalent means for convey 

